| /** |
| * Copyright (c) 2008-2009 Andrey Somov |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.yaml.snakeyaml.nodes; |
| |
| import org.yaml.snakeyaml.error.Mark; |
| |
| /** |
| * @see <a href="http://pyyaml.org/wiki/PyYAML">PyYAML</a> for more information |
| */ |
| public abstract class Node { |
| private String tag; |
| private Mark startMark; |
| protected Mark endMark; |
| private Class<? extends Object> type; |
| private boolean twoStepsConstruction; |
| /** |
| * true when the tag is assigned by the resolver |
| */ |
| protected boolean resolved; |
| protected Boolean useClassConstructor; |
| |
| public Node(String tag, Mark startMark, Mark endMark) { |
| setTag(tag); |
| this.startMark = startMark; |
| this.endMark = endMark; |
| this.type = Object.class; |
| this.twoStepsConstruction = false; |
| this.resolved = true; |
| this.useClassConstructor = null; |
| } |
| |
| public String getTag() { |
| return this.tag; |
| } |
| |
| public Mark getEndMark() { |
| return endMark; |
| } |
| |
| /** |
| * For error reporting. |
| * |
| * @see class variable 'id' in PyYAML |
| * @return scalar, sequence, mapping |
| */ |
| public abstract NodeId getNodeId(); |
| |
| public Mark getStartMark() { |
| return startMark; |
| } |
| |
| public void setTag(String tag) { |
| if (tag == null) { |
| throw new NullPointerException("tag in a Node is required."); |
| } |
| this.tag = tag; |
| } |
| |
| /* |
| * It is not allowed to overwrite this method. Two Nodes are never equal. |
| */ |
| @Override |
| public final boolean equals(Object obj) { |
| return super.equals(obj); |
| } |
| |
| public Class<? extends Object> getType() { |
| return type; |
| } |
| |
| public void setType(Class<? extends Object> type) { |
| this.type = type; |
| } |
| |
| public void setTwoStepsConstruction(boolean twoStepsConstruction) { |
| this.twoStepsConstruction = twoStepsConstruction; |
| } |
| |
| public boolean isTwoStepsConstruction() { |
| return twoStepsConstruction; |
| } |
| |
| @Override |
| public final int hashCode() { |
| return super.hashCode(); |
| } |
| |
| public boolean useClassConstructor() { |
| if (useClassConstructor == null) { |
| if (resolved && !Object.class.equals(type) && !tag.equals(Tags.NULL)) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| return useClassConstructor.booleanValue(); |
| } |
| |
| public void setUseClassConstructor(Boolean useClassConstructor) { |
| this.useClassConstructor = useClassConstructor; |
| } |
| |
| public boolean isResolved() { |
| return resolved; |
| } |
| } |